17=3+7a

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Solution for 17=3+7a equation: 



17=3+7a

We move all terms to the left:

17-(3+7a)=0

We add all the numbers together, and all the variables

-(7a+3)+17=0

We get rid of parentheses

-7a-3+17=0

We add all the numbers together, and all the variables

-7a+14=0

We move all terms containing a to the left, all other terms to the right

-7a=-14

a=-14/-7

a=+2

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